Hi everyone, Do you know if it was possible to cross the German-Polish border as a civilian in September 1939? I am writing a novel, not exactly historical but taking place partly during WWII. My character is in Berlin on Sep 1st and I need him to get to Warsaw by Sep 5th or 6th. The guy is a citizen of a neutral country. Would that have been possible at all? If yes, how would he do that? Plane? Train? Via Koenigsberg? Or Danzig? Or Czechoslovakia? Any thoughts or suggestions would be greatly appreciated! Thanks a lot.